横向
1
Goods sold to another country
4
Flat elevated area of land
5
Seasonal heavy rainfall
6
Largest hot desert in the world
7
Ocean between Americas and Europe/Africa
10
Land surrounded by water
12
Line dividing two countries
纵向
2
Half of the Earth
3
Mountain that can erupt with lava
4
Total number of people in an area
8
Wearing away of land by water or wind
9
Ridge of rock or coral near the surface
11
Cold treeless Arctic plain